Compound Interest Calculator
See how your money grows over time
About This Tool
See how compound interest grows your savings or investment over time. Enter principal, annual rate, compounding frequency, and duration.
Frequently Asked Questions
What is compound interest?
Compound interest is interest calculated on both the initial principal and accumulated interest from previous periods — "interest on interest."
What does compounding frequency mean?
How often interest is added to your balance — annually, quarterly, monthly, or daily. More frequent compounding yields slightly higher returns.
Is this the same as APY?
APY (Annual Percentage Yield) reflects compounding. Enter your APY as the annual rate with matching compounding frequency for accurate estimates.
Does this account for additional deposits?
This version calculates growth on a single initial deposit. Regular contributions would increase the final balance further.